Lever Test | Rationale & Interpretation

The video tutorial explains the lever test, a special test used to assess ACL injuries. It describes the procedure, where the patient is positioned supine with legs extended, and the physical therapist applies force to the quadriceps. A positive test, indicating an ACL injury, is when the ankle does not elevate off the table. Common mistakes, such as incorrect fist placement, can lead to false negatives. The psychometrics of the test show a sensitivity of 86% and a specificity of 25%, meaning it is more reliable for ruling out ACL injuries if negative. The video concludes with a review of the procedure.

What is the initial position of the patient during the lever test for ACL injury assessment?

• Sitting with legs bent

• Standing with legs straight

• Supine with legs fully extended

• Prone with legs bent

What indicates a positive lever test result?

• The calf muscle tightens

• The ankle does not elevate off the table

• The quadriceps contract

• The ankle elevates off the table

What is a common mistake that can lead to a false negative in the lever test?

• Applying force to the distal quadriceps

• Placing the fist too proximally under the calf

• Using both hands to apply force

• Positioning the patient in a prone position

What is the reported sensitivity of the lever test according to the 2020 study?

• 86%

• 100%

• 25%

• 50%

Why can't the lever test be used to rule out an ACL injury if the result is positive?

• Because the test is too complex

• Because the test is not widely accepted

• Because the specificity is too low

• Because the sensitivity is too high